我想知道游標所在的 editText 中的行號。我怎么得到它？
我檢查了檔案，沒有 ps：是 textedit QML，而不是 QTextEdit
uj5u.com熱心網友回復：
你必須使用textDocument和cursorPosition屬性C ：
主程式
#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QQmlContext>
#include <QQuickTextDocument>
#include <QTextBlock>
class Helper: public QObject{
Q_OBJECT
public:
Q_INVOKABLE int currentLineNumber(QQuickTextDocument *textDocument, int cursorPosition){
if(QTextDocument * td = textDocument->textDocument()){
QTextBlock tb = td->findBlock(cursorPosition);
return tb.blockNumber();
}
return -1;
}
};
#include "main.moc"
int main(int argc, char *argv[])
{
#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
#endif
QGuiApplication app(argc, argv);
QQmlApplicationEngine engine;
Helper helper;
engine.rootContext()->setContextProperty("helper", &helper);
const QUrl url(QStringLiteral("qrc:/main.qml"));
QObject::connect(&engine, &QQmlApplicationEngine::objectCreated,
&app, [url](QObject *obj, const QUrl &objUrl) {
if (!obj && url == objUrl)
QCoreApplication::exit(-1);
}, Qt::QueuedConnection);
engine.load(url);
return app.exec();
}
主檔案
import QtQuick 2.15
import QtQuick.Window 2.15
Window {
width: 640
height: 480
visible: true
TextEdit{
id: textEdit
anchors.fill: parent
onCursorPositionChanged: function(){
let line = helper.currentLineNumber(textEdit.textDocument, textEdit.cursorPosition);
console.log(line);
}
}
}
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